C++、linux、无需root的关机命令

Question

是否可以制作一个仅以用户身份运行而不使用 root 权限的关闭脚本？

我找到了这段代码，但它似乎什么也没做:

#include <unistd.h>
#include <sys/reboot.h>

int main () {
    sync();    // If reboot() not preceded by a sync(), data will be lost.
    setuid(0); // set uid to root, the running uid must already have the
               // appropriate permissions to do this.
    reboot(RB_AUTOBOOT); // note, this reboots the system, it's not as
    return(0);           // graceful as asking the init system to reboot.
}

系统信息:

Linux hosek 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Answer 1

具有 systemd 和适当权限的桌面系统可以从控制台连接到 systemd:

systemctl poweroff

https://wiki.debian.org/UserShutdown

或者通过取消 c/c++ 中的 systemd api

Simple C or C++ API for controlling systemd services